Visibility of system status
The system should always keep users informed about what is going on, through appropriate feedback within reasonable time.
(Read full article on visibility of system status.)
Match between system and the real world
The system should speak the users’ language, with words, phrases and concepts familiar to the user, rather than system-oriented terms. Follow real-world conventions, making information appear in a natural and logical order.
(Read full article on the match between the system and the real world.)
User control and freedom
Users often choose system functions by mistake and will need a clearly marked «emergency exit» to leave the unwanted state without having to go...